<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>select下拉表单</title>
</head>
<body>

  籍贯:
  <select name="" id="">
    <option value="">山东</option>
    <option value="">上海</option>
    <option value="">湖南</option>
    <option value="">天津</option>
    <!-- selected="selected" 默认选中 -->
    <option value="" selected>北京</option>
  </select>
  
</body>
</html>